* {
  font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
}
html,
body {
  width: 100%;
  height: 100%;
}

#app {
  height: 100%;
  background: #f5f5f5;
}